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The effect of photosensitizer on diclofenac photodegradation under simulated sunlight
1School of Chemistry and Environmental Science, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Jianshe Road, Xinxiang 453007, China.
Abstract:
This paper studies the effect of photosensitizer (acetone, H(2)O(2), surfactant and pigment) on photodegradation of diclofenac (DCF) under simulated sunlight. The results demonstrate that degradation pathways proceed via pseudo first-order kinetics in all cases. The photodegradation rate was found to increase with increasing acetone and H(2)O(2). Surfactant and pigment inhibited the photodegradation of DCF. Finally, four kinds of main degradation products were observed by high performance liquid chromatography/mass spectrometry and their chemical structures were suggested.
